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S70 still balks about 10 minutes after starting. S70

Ok, my Volvo S70 non-Turb with 106K miles.

Leaving the house, after 10 minutes of highway driving, I reach a big hill. The car will shake once or twice while going 70, like I ran into something with the Check Eng light flashing at the same time. No code saved.


I am confident it isn't tranny related as if I overcome my fear of being jerked around and give it more gas, it does downshift to finish the hill. And, I believe I understand that the torque converter won't absorb this jerking motion if it is locked.

Just for fun, I did shotgun the fuel pump controller under the fuse panel. But, now I'm thinking the coil module under the ignition coil should go next.

More interesting, if I start the car from cold and am driving on a residential street, the engine dies instead of balks. But, I can restart it right away.

I hate to think I have to keep driving until it fails hard.






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